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This patch adds support for TLS-wrapped submission connections. Instead of clients establishing a connection over plain text and then using STARTTLS to switch over a TLS connection, this new mode allows the clients to connect directly over TLS, like it's done in HTTPS. This is not an official standard yet, but it's reasonably common in practice, and provides some advantages over the traditional submission port. The default port is 465, commonly used for this; chasquid defaults to systemd file descriptor passing as for the other protocols (for now).
This directory holds end to end tests, written usually in a combination of shell and some Python. They're not expected to be portable, as that gets impractical very quickly. They also have some dependencies, listed below. ## Dependencies The tests depend on the following things being installed on the system (listed as Debian package, for consistency): - msmtp - util-linux (for /usr/bin/setsid) For t-02-exim (Exim interaction tests): - gettext-base (for /usr/bin/envsubst) - The exim binary available somewhere, but it doesn't have to be installed. There's a script "get-exim4-debian.sh" to get it from the archives. For some tests, python >= 3.5 is required; they will be skipped if it's not available.